Improvement in making zinc-white



R JONES- Making White Zinc.

Patented March 28, 1854;

N4 PETERS. Plmlo-Ldimgmpher, Wnshinulnn, D L:

Nrrn STATES" IMPROVEMENT IN MAKING Z'INC-WIr -I'ITE.

Specification forming part of Letters Patent No. 10,696, dated March 28,1854.

To all whom it may concern:

be made of iron and connected to the. domes Be it known that I, RICHARDJ ONES, of the D, which form the tops of the collecting-chamcounty ofBurlington and State of New Jersey, have invented certain new and usefulImprovements in the Process of Manufacturing White Oxide of Zinc, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawing, which makes part of thisspecification, and which represents a vertical section through so muchof an apparatus for making white oxide by my improved process as isnecessary to illustrate my improvements.

My improvements are applicable to the manufacture of the white oxidefrom metallic zinc or from any of its ores suitable for the purpose; andmy invention consists .in forcing a jet of air among the fumes andvapors which rise from the furnace or retort in which the zinc or itsore is heated. The office of this jet of air is to oxidize the vapor ofzinc, cool it, and carry it over into the collecting-chambers.

My invention further consists in so constru cting and arranging thepipes for conducting the mixed air and vapor into the"collectingchambers, and from one chamber to another, that every portionof the conduit shall be inclined sufficiently to prevent it from chokingby the lodgment of the oxide.

My invention further consists in constructing and arranging theconduit-pipes in such manner that the vapor shall be forced down intoone collecting-chamber, and must rise to go into another, by which meansthe deposited oxide is assorted in as many different qualities asthereare receiving-chambers:

The accompanying drawing represents an apparatusby means of which myimprovements may be carried into effect. The furnace or retort and thefan or other blower are omitted, as they may be made in the usualmanner. The mouth A of the furnace or retort terminates at the entranceto the pipe 0, which conducts the vapors to the collecting-chambers. Thenozzle B of the blast-pipe, for supplying air to oxidize the vapors andto create the requisite draft, enters the foot of the conduit 0, and thepressure given to the air by the blower must be such that the mechanicalforce of the jet issuing from the nozzle will be sufficient to conveythe vapors through a series of receiving-chambers. The conduit-pipesshould ,bers. The pipes in this instance are arranged in a series ofpointed arches, F, the sides of which meet at the top at an angle ofabout forty-five degrees and terminate at their bottoms, which are openin the domes D, sothat no place in the pipes is left flat enough for theoxide to accumulate on. As the pipes f, that lead the vapor into thedomes, are all inclined downward, the vapor is thrown down to the bottomof the chambers,'and must rise again before it can enter the ascendingside f of the arch,to pass into the next chamber.

The collecting-chambers are represented as consisting of a sack, E, ofmuslin, which I deem the best material known for' the purpose,

Each of these sacks E-is suspended from a dome, D, and has a contractedneck, I, at its lower end,'to collect and more conveniently dischargethe product. By this arrangement an abundance of air is alwaysintermixed with the vapors, which insures their rapid cooling andthorough oxidizing, as oxygen is always present in excess. y;

The form and arrangement of the parts may be greatly varied without anydeparture from the principles of my invention, and I contemplate to makesuch changes, if necessary, to adapt the apparatus to differentcircumstances and to suit the views of different ,constructers. Some ofthe improvements, too, are applicable to other apparatus, and one ormore of them will often befound useful when separated frommy apparatusand introduced into others.

2. The blowing of the mixed air and vapor" through a series of narrowvertical chambers in succession, in each of which the vapor descends onentering, and must rise again to the top before it can pass into thenext'chamber, whereby the oxide is sooner deposited, and at the sametime is separated into as many difing and condensing chambers,substantially" as ferent qualities as there are chambers. described.

3. Constructing the conduit-pipes so that In testimony whereof I havehereunto subevery portion of them shall be inclined in such scribed myname. manner as to prevent the accumulation of matter to clog them, andto direct the current RICHARD JONES of vapor downward on entering thecondens- I Witnesses: ing-chambers, the conduits thus constructed JosEPrI L. MORTON,

and operating being arranged over the collect- TILLIAM EARLEY.

